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AVprozaik [17]
3 years ago
13

Can someone who is good at math help me plssssss

Mathematics
1 answer:
pishuonlain [190]3 years ago
6 0

Answer:

angle DBC = 20 degrees

Step-by-step explanation:

We know that ABC is an isosceles triangle, therefore angle ACB = 80 as:

180 - 20 = 160

160/2 = 80

Now, the next few parts, you need to draw on paper to understand:

  • First, draw an isosceles triangle with the base of it on AD, and label the angles as (80, 80 and 20) on the right hand side. Also, label the top vertex of this triangle as X.
  • Then on the left hand side, draw an equilateral triangle with the base as AB, with the top vertex pointing to the top left, and label all the angles as  60 as it is equilateral. Also, label the top of this vertex as Y.
  • Now you should be able to see a large 5-sided shape with the vertexes of YAXDB.
  • We can label angle CDB as 80 because triangle BDC is an isosceles, therefore the bases are the same.
  • We can work out angle ADB as angles in a straight line add up to 180:  180 - 80 = 100.
  • Label angle ADB as 100
  • We can find the sum of the interior angles of a 5 sided shape with:          (n - 2) x 180 which if we input n = 5, we get 540.
  • Add up all the angles in the 5-sided shape, which will leave out ABD (from angle BYA clockwise):

60 + 60 + 20 + 80 + 20 + 80 + 100 + 60 = 480

  • Now we just need to work out what angle ABD is by subtracting 480 from the sum of interior angles (540) which gets: 60
  • From earlier on, we know angle ABC = 80 as the ABC triangle is isosceles, to work out what angle DBC is, we just need to do the final calculation:

80 - 60 = 20

and there's your final answer.

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2 years ago
Pls help me with this problem
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Answer:

A is going to be 2.80

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Hope this Helped

4 0
2 years ago
Read 2 more answers
Purchase price of article = $5,555 Down payment = $555 Number of payments = 42 True annual interest rate=18% Monthly Payment= $
bixtya [17]
The answer to the monthly payment is $257.1428571 or $258.

How to get the answer:
Simply minus $5555 to $555. You get $5000. 
Then, divide $5000 to the number of payments which is 42. (5000/42)
For that, you get a total of 119.047619. But that is not the final answer yet.
Next, we will multiply 119.047619 to 12, because we are looking for the monthly payment and we were given an "annual" rate. Annual means yearly and every year we have twelve (12) months. In that case, 119.047619 multiplied by 12 is equal to 1428.571428. Still, it is not the final answer.
The last step is, we will multiply the answer 1428.571428 to 18% or .18 and we get a total of 257.142857. Since we used the unit $ then we will a dollar for the answer. Completing the answer to the ]question, we get a total of $257.142857 or $258 for the monthly payment.

6 0
3 years ago
Read 2 more answers
An amphitheater charges $74 for each seat in Section A, $59 for each seat in Section B, and $28 for each lawn seat. There are th
Ivenika [448]

Answer:

<h2>(4x+z)=13000------1</h2><h2>(4x+z)13000=503000----2</h2>

Step-by-step explanation:

let x be the number of seats in A,

y be the number of seats in B, and

z be the number of lawn seats.

y=3x

the total number of seats is given by

(x+y+z)=13000

put y=3x

(x+3x+z)=13000

(4x+z)=13000------1

also

(4x+z)13000=503000----2

hence the systems of equation is

(4x+z)=13000------1

(4x+z)13000=503000----2

7 0
3 years ago
the length of a rectangle is 6.7 cm more than 2 times the width. If the perimeter of the rectangle is 57.2 cm, what are its dime
ss7ja [257]
57.2-6.7-6.7=43.8
43.8÷6=7.3
7.3×2+6.7=21.3
length = 21.3cm
width = 7.3cm
(21.3×2)+(7.3×2) = 57.2
hope that helps
6 0
3 years ago
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